When you have time you can spend it in the Library of Congress. There is enough information in there alone to show many of the conspiracies that exist.

The examine some of the declassified documents that exist.

Flow some of the obvious money trails which are documented and public knowledge.

The with this data, the patterns will begin to reveal themselves.

A great place to start is with the Federal Reserve. This is a an important place to begin that will lead you into a very revealing view of who the players are and their undertakings/agendas. By looking at these important vectors of power, things will flesh out from there.

There is plenty reputable data available in other forms.
Also it is important to remain skeptical and open at the same time (balance) If you do you will see data being spun too throw people off. The official term for that is cointelpro.